1.)Which equation will result if the substitution method is used to solve the following system of linear equations?

x+y=6
x=y+2

x+y=y+2
x+(y+2)=6
x=(x-6)+2
(y+2)+y=6

2.)Solve the following system of equations by linear combination:
5x+2y=14
y=x-7

(-3,4)
(2,-5)
(4,-3)
(-5,2)